#include<iostream>
using namespace std;
int main()
{
	int a, b, c;
	cin >> a >> b >> c;
	if ((a + b) > c && (a + c) > b && (b + c) > a)
	{
		cout << 1;
	}
	else
	{
		cout << 0;
	}
	return 0;
}